He absolutely was.

He asks "Can you say with 100% certainty that TikTok does not use the phone's camera to determine whether the content that elicits a pupil dilation should be amplified by the alogorithm?"

Chew: "The only face data that we collect is when you use the filters to have sunglasses on your face, we need to know where your eyes are."

Congressman: "Why do you need to know where the eyes are if you're not seeing if they're dilated??"

Apparently I can only find primary sources of this hearing on TikTok itself, so: https://www.tiktok.com/@jamiethisyoujeffries/video/721387823...